#include <stdio.h>
#include <math.h> 
int main()
{
	freopen("zz_test\\test5.in", "r", stdin);
	freopen("zz_test\\test5.out", "w", stdout);
	
	double A = 0, B = 0;
	scanf("%lf %lf", &A, &B);
	double t = (B * 1000) / A;
	printf("%.2lf", t);
	return 0;
} 
